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Goethite Psm Siderite Psm Fluorite

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BSM570864

Goethite Psm Siderite Psm Fluorite

ex Michael Bates Collection
Pseudomorph

Description Tabs

Description
Locality: 
Boltsburn Mine, Rookhope, Weardale, County Durham, United Kingdom
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
4.6 × 8.7 × 3 cm
Description

An interesting specimen of goethite forming part of a cube box pseudomorphing siderite crystals after a fluorite crystal that would have been 6.4 cms on edge. This pseudomorph sits on thin plates of quartz which also pseudomorph fluorite with a large complex crystal of sphalerite nestling on the quartz.

Comes with a Nick Carruth dealer label and was purchased by Michael Bates at the Sussex Mineral Show in 1998.

Previous labels supplied (not photographed)
Mineral Data
What's on the rock

Goethite

Formula: 
α-Fe3+O(OH)
Strunz: 
4.00.
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 5.5
Type Locality: 
Hollertszug Mine (Hollerter Zug Mine), Dermbach, Herdorf, Siegerland, Rhineland-Palatinate, Germany

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Seller Information

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